its a real pain in the a*$£ getting it right i made 3 front frames then went and bought one ready done i worked it out afterwards and made another just to be sure i could get it right on my jig i made sure ff1 and ff4 could not move side to sideby bracing the ends of the tubes
i then marked the 26 degree angles and cut the wedge bent measured the angle and welded
the mitres are a pain to get your head around just remember they are handed so practice on a few scrap peices first
once you have got them cut a good idea would be to mock up the final position of the front wishbone brackets cause getting them right now will save you a head scratching later
sorry if it seems a little like teaching your granny to suck eggs but i got it wrong 3 times unfortunately i dont still have the last one i made i ended up cutting it up otherwise i would have just sent it down to you but keep at it and good luck
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